IBAN Validator
Validate IBAN structure, length, and mod-97 check digits for 80+ countries. Catch transfer typos before money moves — local ibantools work, free, no signup.
How to Use the IBAN Validator
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Frequently Asked Questions
How does IBAN validation work?
Country length rules plus mod-97 check digits computed from rearranged digits. Valid structure passes; typos fail mathematically — no bank query needed.
Does valid mean the account exists?
No — structure valid only. Existence and ownership verify via bank confirmation (Confirmation of Payee where available).
Which countries covered?
80+ official IBAN registries with per-country lengths and formats. Non-IBAN countries (US, India) use local systems instead.
Are IBANs uploaded?
No — validation runs locally in your browser with ibantools. Numbers never leave your device — still, prefer test IBANs for trials.
Is there a known-good IBAN I can test with?
Yes — the placeholder GB29 NWBK 6016 1331 9268 19 validates: spaces are stripped and letters uppercased before the mod-97 checksum runs. Change the final 9 to 8 and it fails, proving the check is purely mathematical. A valid structure still doesn’t mean the account exists — confirm with the bank.
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Last updated October 2026